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9 votes
9 votes
If a number is increased by 4, its square is increased by 64. Find the number

User Gertie
by
2.4k points

2 Answers

21 votes
21 votes

Answer:

6

Explanation:

(n + 4)^2 = n^2 + 64

n^2 + 8n + 16 = n^2 + 64

8n = 48

n = 6

User Taraloca
by
3.2k points
8 votes
8 votes

Answer:

12

Explanation:

12 - 4 = 8

The square of 8 is 64

User Davia
by
3.1k points